It appears that fsockopen prior to php5 did not need the unix:// qualifier when opening a unix domain socket:
php4: fsockopen("/tmp/mysocket"......);
php5: fsockopen("unix:///tmp/mysocket"......);
This caught me out when upgrading.
unix:// and udg:// (udg:// since PHP 5).
unix:// provides access to a socket stream connection in the Unix domain. udg:// provides an alternate transport to a Unix domain socket using the user datagram protocol.
Unix domain sockets, unlike Internet domain sockets, do not expect
a port number. In the case of fsockopen() the
portno parameter should be set to 0.
It appears that fsockopen prior to php5 did not need the unix:// qualifier when opening a unix domain socket:
php4: fsockopen("/tmp/mysocket"......);
php5: fsockopen("unix:///tmp/mysocket"......);
This caught me out when upgrading.